In the several games I tried with AI vs AI, OTB AI succeeded quite a few times in promoting a pawn. As far as I can tell, there was no immediate visual indication as to which piece it was promoted to, although by later behavior I could ascertain it was queen. I didn’t play with app connected for virtual board display.
Would AI promote to knight or should we always assume it is queen? Should some indication be implemented OTB?
Edit: just found from Related topics it is related to this topic: https://community.playchessup.com/t/questions-about-promotion/